Andrews, J.S. et al. 1943. PRELIMINARY NOTE ON THE ADMINISTRATION OF NON-CONDITIONED PHENOTHIAZINE, IN SMALL DAILY DOSES, FOR THE CONTROL OF GASTROINTESTINAL PARASITES OF CATTLE IN PUERTO RICO. The Journal of Agriculture of the University of Puerto Rico. 27, 3 (Jul. 1943), 125–130. DOI:https://doi.org/10.46429/jaupr.v27i3.12886.